Last Part- Who have understanding of Deen and Husny-khulq?

link to learn Part 1 and Part 2.
What is meant by Understanding of deen?
Answer : Knowledge which gives satisfaction to the heart, comes on tongue and helps one attain good deeds, brings in a human being the qualities of Fearing Allah and Taqwa.”
Further explanation :
True understanding necessarily generates action that reflects the understanding. For example, most people have not personally experienced the devastation caused by a nuclear weapon, but do you have any doubt that they will do all that is in their power not to have one dropped on them? 
Thus, when understanding of the Deen exists, it will result in righteous action and bring one on to the path leading to Paradise. This will ensure everlasting happiness for that person, without a single blemish to mar it. 
 The blessing of understanding Islam, such that one’s belief and behaviour reflect it, is a sign of Allah’s special favour to that person. One has to make oneself worthy of the honour.
Which knowledge is needed for developing understanding in deen?
1-      Understanding of Quran and Hadith.
2-Understanding of knowledge of the lawful(Halal) and the unlawful(Haram).
2-      Understanding of religious injunctions.
Surah Al Baqarah, Ayah 122.”….Of every troop of them, a party only should go forth, that they (who are left behind) may get instructions in (Islamic) religion, and that they may warn their people when they return to them, so that they may beware (of evil).”
This was said for the people who lived around Madina, that they are busy in earning, so why donot some people get out from different areas and travel to madina for seeking knowledge and than come back to their areas to teach Islam, to rest of the people.
The Prophet (sal Allahu alaihi wa sallam) said, “When Allah wishes good for someone, He bestows upon him the understanding of Deen.”
[Sahih Al-Bukhari and Muslim]
The above Hadith highlights the excellence of possessing understanding of this Deen (the religion of Islam) and the fact that it is a sign of Allah wanting good for someone.The above Hadith also shows the importance of seeking knowledge.
In Sahih Bukhari,It is related from Abu Hurayra that the Prophet, may Allah bless him and grant him peace, said, “You will find people to be like mines. The best of them in the Jahiliyya are the best of them in Islam when they have understanding. “
[Mines contain different minerals, some precious and some base.]
It means Qualities or skills of People were used in a wrong way and after entering Islam, they used their potential in a right way by understanding the deen. For example, Umar Ibn Khattab who was brave man and Khalid bin Waleed from whom people feared in battle because he too was brave.  Before, he used to fight against Muslims and after entering Islam, his skills was used in a right way by helping Muslims in battle. Similarly, when we put water in gutters they don’t benefit us but putting water on soil do benefit us in many ways. Therefore, using our skills in a right way, together  with the condition of understanding of deen makes people best.
Sahih Al-Bukhari ,      Narrated byAbu Musa
The Prophet said, “The example of guidance and knowledge [Ilm] with which Allah has sent me is like abundant rain falling on the earth, some of which was fertile soil that absorbed rain water and brought forth vegetation and grass in abundance. (And) another portion of it was hard and held the rain water and Allah benefited the people with it and they utilized it for drinking, making their animals drink from it and for irrigation of the land for cultivation. (And) a portion of it was barren which could neither hold the water nor bring forth vegetation (then that land gave no benefits). The first is the example of the person who comprehends Allah’s religion and gets benefit (from the knowledge) which Allah has revealed through me (the Prophets and learns and then teaches others. The last example is that of a person who does not care for it and does not take Allah’s guidance revealed through me (He is like that barren land.)”
There is a ground on which rain  is absorbed, which results in growth of trees, plants and fruits which give benefit to the people.Another type of ground, which is hard so donot absorb rain, instead it held the rain on it by which people take benefit from it.Third type of ground which is barren, which could neither absorb nor hold the water, resulting in no vegetation or benefit to the people in anyway.
The first example was a person who seeks knowledge, understands it by absorbing it and at last,  acts on it, which gives benefit(by teaching) to the people.May ALLAH make us among these people Ameen.
The Messenger of Allah (sallallahu alaihi wa-sallam) said: ”Envy is allowed in two cases, in case of a man whom Allah has given the Qur’aan and who recites it throughout night and day; and a man on whom Allah has bestowed wealth who gives it away throughout night and day.” [Saheeh al-Bukharee and Saheeh Muslim]
For understanding deen we must pray to ALLAH sincerely just like Prophet prayed for Ibn Abbas.
“”O Lord, make him acquire a deep understanding of the religion of Islam and instruct him in the meaning and interpretation of things.”
Ibn Abbas (R.A.) said: To discuss about learning in a portion of night is dearer to me than to keep up awake throughout the night in prayer.
Abu Darda (R.A.) said: He who thinks that to go at dawn in search of knowledge is not jihad is deficient in intellect.
What is the purpose of understanding of deen?
Answer : To prepare people who will play the role of “Munzir” which means the one who aware about consequences in a very polite way. Such kind of people will save themselves and people, from sins which can displease ALLAH.
Taken from : Tawheed online